Differences Between Normals and Schizophrenics on Activation-induced Change in Two-flash Fusion Threshold

Research relating brain stem stimulation and cortical selectivity by Lindsley (1957) led Venables (1963) to utilize a score from a perceptual discrimination task (two-flash fusion threshold, T.F.T.) to examine hypotheses relating arousal level to perceptual dysfunction and schizophrenic symptoms. Ot...

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Bibliographic Details
Published in:British journal of psychiatry 1969-04, Vol.115 (521), p.477-478
Main Authors: Hieatt, D. J., Tong, J. E.
Format: Article
Language:English
Subjects:
Abstract
Adult
Arousal
Heart Rate
Humans
Male
Paranoid Disorders
Schizophrenia
Short Papers
Time Factors
Visual Perception
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Summary:Research relating brain stem stimulation and cortical selectivity by Lindsley (1957) led Venables (1963) to utilize a score from a perceptual discrimination task (two-flash fusion threshold, T.F.T.) to examine hypotheses relating arousal level to perceptual dysfunction and schizophrenic symptoms. Other work failed to confirm the results (Hume and Claridge, 1965), possibly due to the unsuitable method of determining T.F.T., a method of constant stimuli. The following experiments were based on the proposition that perceptual functioning is related to arousal level, and also attempted to resolve confusions arising from earlier studies by control of possible sources of error in the experimental situation.
ISSN:0007-1250
1472-1465
DOI:10.1192/bjp.115.521.477